How to Tell the Difference in Cotton Thread Weights
- 1). Read the label on your spool of thread. Common cotton sewing thread will usually have a label that reads #50/3. This means that your thread will be a moderate weight thread made up of three yarns that have been spun together to form the thread. This thread will be fairly strong and is easily threaded on any sewing machine. It will work well for hand sewing, as well as for making or repairing garments.
- 2). Labeling of #100/2 denotes a thread that is very fine and excellent for hand applique. They are not very strong because they are so fine. The thread consists of two yarns which are very finely spun. These two yarns are then spun together to form the thread.
- 3). A label which reads # 30/3 is a heavy thread. Thread of this kind consists of three heavy yarns spun together to form the thread. This type of thread often comes with a special finish to it called a glace finish. This helps to keep the thread from knotting and tangling. Threads of #30/3 weight are used for quilting since you need the heavier weight to hold up to the stress of the quilt's weight.
